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Pretty large opening on the mating surface so you'll have plenty of room to open up your intake
EXTRA TIP- This should also fit the Yamaha rd60
four boost ports
Original Tomos part number 233
let us know and we can special order one
Derbi Flat Reed Autisa 40mm "50cc" Cylinder Kit dt50mx Pretty large opening on theVintage and discontinued 40mm, 50cc Autisa kit for Derbi Flatreed engines. Aluminum cylinder with auxiliary exhaust ports. Two ring piston. Should make for a fun vintage blaster. Ports will need to be dressed and chamfered particularly the primary exhaust port. Comes with cylinder, piston, ring, pin clips, and gasket set.
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